Katyusha rocket launcher Wikipedia
The Katyusha multiple rocket launcher (Russian: Катю́ша, IPA: [kɐˈtʲuʂə] ()) is a type of rocket artillery first built and fielded by the Soviet Union in World War II. Multiple rocket launchers such as these deliver explosives to a target area more quickly than conventional artillery, but with lower accuracy and requiring a longer time to reload.